Valve



May 14, 1935. PI L. "WING 2,001,251

VALVE Filed July 30, 1954 Patented ay i4, i935 VALVE Philip L. Irving,Port Huron, Mich., assigner to Mueller Brass Co., Port Huron, Mich., acorporation of Michigan Application July so, 1934, serial No. 737,616

4 Claims. (Cl. 251-31) This invention relates to valves, and withrethreaded as indicated at numeral I1 to receive spect to certain morespecic features, to packcooperating interior threads on a cap or closureless valves. member I9. The cap I9 is cup-shaped, and is Among theseveralobjects of the invention provided with radial ears 2| tofacilitate its being 5 may be noted a valve of the class describedturned manually. A set screw 23 is threaded 5 which is so constructedthat it may be manually radially into the lower end of the cap I9, andopened and closed without destroying the effecengages the unthreadedwall of the casting I to tiveness of the seal against leakage from theprevent unwanted removal of the cap I9 from the valve; the provision ofa valve of the class decasting I.

10 scribed which is so constructed that a sealing The portion 1 of thecasting I is also interiorly 10 element, if found to be defective, maybe rethreaded, as indicated at numeral 2li. Into this moved and replacedwithout removing the valve portion l is first threaded a bushing element25 from its line and without cutting on the flow of having a at l0we1face 2l. The faCe 2l Clamps fluid through the valve; and the provisionof a a gasket 29 against the shoulder I3 formed bel5 valve of the classdescribed which is relatively tween the Cylindrical portions l and 9-The 15 simple in construction and is fool-proof. Other member 25 is alsoprovided with a pair of 'holes objects will be in part obvious and inpart 3|, for receiving a spanner Wrench so that it pointed outhereinafter. may be driven down and clamped upon the gas- The inventionaccordingly comprises the elekei? 2l9 ments and combinations ofelements, features The member 25 carries at its center a relative- 20 ofconstruction, and arrangements of parts 1y long, upstanding bushingmember 33, Which Which will be exemplified in the structuresherereceives in a relatively close fit, a valve stem 35. inafterdescribed, and the scope of the applica- The lower end of the member iscounterbored tion of which will be indicated in the following aSindicated at numeral 3l. t0 PTOVide an annu- 25 claims. lar back-seatingvalve seat lll. 25

In the accompanying drawing, in which is i1- The.v valve stem 35 carriesat its lower end a lustrated one of various possible embodiments valveclosure element 43, which is adapted to of the invention, seat againstthe main valve seat I5. The closure Fig. 1 is a front elevation of avalve embodying element 43 alSO includes an upwardly facing 30 thepresent invention; conical face e5, which is adapted to back-seat 30Fig. 2 is a vertical, axial cross section taken against the valve Seat4L substantially on line 2 2 of Fig. 1; At its upper end, the valve stem35 is drilled Fig. 3 is a top plan view of the valve of Fig, 1; toreceive a cross pin 41, against which is placed and a washer 49. Acompression spring 5I reacts Fig. 4 is a top plan view of the valve ofFig. 1 between the under face of washer 49 and the 35 with a coverportion removed. shoulder formed between bushing 33 and mem- Similarreference characters indicate correbel' 25, and 1Zends at all times t0maintain the sponding parts throughout the= several views of Valve inOpen DOSiiOn With the back-Seated P01'- the drawing. tion 45 seated onthe seat 4I.

Referring now more particularly to Figures 1 Numeral 53 indicates acollapsible bellows, 40 and 2, numeral I indicates the valve body, whichpreferably made of the spring copper, bronze, iS preferably cast of ametal such as brass. The brass or the like. The bellows 53 is closed atits body I is provided with oppositely directed inlet upper end 55 andiS Preferably DIOVided Wil?h a and outlet openings 3 and 5,respectively. The wear receiving plate 51 attached to the outer inlet 3and outlet 5 are suitably exteriorly face of end 55. The lower end ofthe bellows 53 45 threaded to receive couplings for making connecisflared outwardly, aS indicated all numeral 59- tions to high-pressurefluid lines, or the like. In assembly, the nare 59 of the bellows 53 isThe body casting I is interiorly hollow, being clamped against the upperface of element 25 provided with a series of cylindrical openings l, bythe lower end of a plug 6I threaded into the 9, and II, of graduallydecreasing diameters. upper portion 'l of the casting I. The plug 6I 50VBetween the portion I and the portion 9 is a, has, at its upper end, ahexagonal head 63 (see shoulder I3, and between the portion 9 and theFig. 4) to permit the application of a wrench portion Il is a shoulderI5.` The shouIder I5 for the purpose 0f driving down the plus 6I toforms the seat for the valve proper, to be declamp the flare 59eiectively against the upper 575 scribed. It will be noted that theinlet 3 comface of element 25. The plug 6l is inwardly 55 municates withthe portion II, while the outlet hollow, to pass over the bellows 53. 5communicates with the portion 9. Hence, the The operation of the valveas thus described valve seat I5 is interposed between the inlet 3 is asfollows: and the outlet 5. The spring 5I normally maintains the valve 60The upper end of the casting I is exteriorly at open position, thuspermitting the passage i of fluid from the inlet 3 to the outlet 5. Whenthus open, the spring 5| normally forces the back-seating closureportion 45 against the seat 4|, thus preventing leakage of iuid alongthe bushing 33. This back-seating is so eiected that, under normalcircumstances, the plug 6| and bellows 53 may be removed from the valvewithout any leakage taking place. This is a valuable feature, in that itpermits the replacement of the bellows 53 in the valve while it is inoperation on a pressure line, without thereby permitting any leakage offluid from the valve.

When the cap 2| is vthreaded down upon the casting l its top inner face65 is brought to bear upon the wear receiving plate 51 of bellows 453,and hence indirectly upon the valve stem' 35. As this threadingcontinues, the stem 35 is forced downwardly until the back-seatingclosure 45 is removed from the seat 4|. y Under such circumstances, theback-seating arrangement is no longer effective to prevent leakage, butthis is taken care of by the sealing bellows element 53. Any uid leakingalong the bushing 33 can escape only into the interior of bellows 53 andno further. Ultimately, as the cap 2| is further threaded down on thecasting the main closure element 43 is brought to seat upon the mainvalve seat |5, and hence fiow of fluid from the inlet 3 to the outlet 5is prevented. Y

It is thus seen that by threading the cap I9 up and down upon the bodycasting I, the main valve 43 is caused to seat and unseat, thuscontrolling the iiow of iiuid through the valve.`

The device is hermetically sealed when assembled, by the gasket I3, thebellows element 53, and if the valve stem 35 is in the proper position,by the back-seating valve 45. Hence, no leakage is possible under anycircumstances of normal operation. Even if the bellows 53 should becomedefective, through wear or the like, such defective bellows element maybe replaced by a new bellows element merely by removing the set screw23, threading the cap I9 entirely` off the body portion removing theplug 6|, and slipping the bellows element 53 oi of the stem 35. Duringall this time, the spring 5| holds the valve in back-seated position, sothat no leakage is possible therefrom. vA new bellows element 53 may nowbe placed in position, and the nut 6| rethreaded into position to clampsaid new bellows 53 in the aforesaid manner.

The set screw 23 likewise serves the purpose of preventing movement ofthe cap I9 too far upwardly. Numeral 61 indicates a plate which isadapted for mounting the valve. 'I'he plate 61 is held on the casting byscrews 69, and has holes therein-for receiving suitable screws formounting the valve in a system.

In view of the above, it will be seen that the several objects of theinvention are achieved and other advantageous results attained.

As many changes could be made in carrying out the above constructionswithout departing from the scope of the invention, it is in- -tendedthat all matter contained in the above description or shown in theaccompanying drawin a limiting sense.

I claim:

l. A valve comprising a hollow body, a valve seat in said body, inletandoutlet means disposed on opposite sides of said valve seat, said bodybeing open at one end, an element threaded into the open end ofsaid-body and having a bushing, a valve stemr slidable in said bushing,Ysaid valve stem carrying at one end a valve closure element adapted toseat upon said valve seat, spring means tending to maintain said closureelement off said valve seat, a collapsible bellows element surroundingsaid valve stem, spring means, and bushing, said bellows element beingclosed at one end and outwardly flared at the other end, a plug threadedinto the open end of said body and clamping the flared end of thebellows element between itself and said first-named element, the closedend of the bellows abutting the end o f the valve stem, and meansthreaded for vertical movement relative to said body, said last-namedmeans having a portion adapted to engage the closed end of said bellows,whereby threading of said last-named means downwardly relative to saidbody moves said valve stem against the reaction of said spring means toseat said valve closure element on said valve seat, and wherebythreading of said lastnamed means upwardly relative to said body permitssaid spring means to move said valve stem to unseat said valve closureelement from said valve seat.

2. A valve comprising a hollow body, a valve seat in said body, inletand outlet means disposed on opposite sides of said valve seat, saidbody being open at one end, an element threaded into the open end ofsaid body and having a bushing, a valve stern slidable in said bushing,said valve stem carrying at one end a valve closure element adapted toseat upon said valve seat, spring means tending to maintain said closureelement oil. said valve seat, a collapsible bellows element surroundingsaid valve stem, spring means, and bushing, said bellows elementbeingclosed at one end and outwardly ared at the other end, a plug threadedinto the openend of said body and clamping the flared end of the bellowselement between itself and said first-named element, the closed end ofthe bellows abutting the end of the n valve stem, and a cap threaded tosaid body, said cap being adapted interiorly to engage the closed end ofsaid bellows, whereby threading of said cap down said body moves saidvalve stem against the reaction of said spring means to seat said val'veclosure element on said valve seat, and whereby threading of said cap upsaid body permits said spring means to move said valve stem to unseatsaidv valve closure element from said valve seat, said first-namedelement having a counterbored portion providing a back-seating valveseat, and said valve closure element having a back-seating portionthereon adapted to cooperate with said back-seating valve seat under theinuence of said spring means.

3. A valve as set forth in claim 1, in which the body has a shouldertherein, and a gasket, said gasket being clamped against said shoulderby said first-named element.

4. A v alve as set forth in claim 2, in which the body has a shouldertherein. and a gasket, said i gasket being clamped against said shoulderby said first-named element.

PHILIP L. IRVING.

